Sheet-metal roofing.



PATENTED JAN. 28, 1908.

J. P. GALBRAITH. SHEET METAL ROOFING. APPLIOATION FILED SEPT.13. 1906.

UNITED STATES ATENT OFFICE.

SHEET-METAL ROOFING.

Specification of Letters Patent.

Patented J an. 28, 1908.

Application filed September 13. 1906. Serial No. 334.509.

To all whom it may concern:

Be it known that 1, JOHN FRANCIS GAL- BRAITH, of Shelbyville, in the county of Bedford and State of Tennessee, have invented 3 a new and useful Improvement in Sheet- Metal Roofing, of which the following is a Y specification.

My invention has to do with the oint between metal roofing shingles or plates, the

i object primarily being to obtain a joint which is weather proof, non-leaking, of great strength and durability, and requiring the minimum of material for its formation.

A furtherobjectis to form the jointso that the same may be applied to both edges of the shingle, thus permitting it to be used in working either to the right or leftin.i

other words permitting the work to be started at any point between the eaves and comb of a roof and thence to be carried on both to the right and left working to the right and the other to the left.

The invention will first be described in connection with the accompanying drawings and will then be more particularly pointed out in the claim.

In the drawings, Figure 1 is a perspective view of several joined sheet metal roofing Fig. 2 1s 1 shingles embodying the invention. an end elevation of one of these shmgles. to

illustrate more clearly the symmetrically formed opposite edges.

The shingle A, as indicated, has on each edge a border 72 adapted to serve as either a nailing edge or tongue member ofthe joint.

as the case may mately inverted V form in cross section (composed of legs 6 j) which constitutes the cap member of the joint, and a bead as between the border h and the cap member.

The two edges are symmetrical.

l The cap member is formed by folding and j with a border I: adapted to serve as a tongue pinching together the sheet metal of the shingle to form a mately inverted V form as shown. clined front'leg 'i of the cap member is that under and againstwhich the tongue 71 of the next adjoining plate rests. The rear inclined to leg j of the cap member springs from the face of the shingle: and within the cap member. back of and below the meeting faces of the members of the joint, is a valley g which receives any moisture that may form in or enof that point, one man be. a member of approxisolid flange of double thick- 4 5 ness and then bending tlusflange mto approrn- I The inl ter the joint, and serves not only to ventilate 1 the joint but also as aper-manent drain or Way through which all moisture or water which may pass beyond the meeting faces of the members of the joint can be at once carried oil. The border 71 forms the tongue member of the joint when itoverlaps the edge of the adjoining shingle. But. when it is overlapped by and lies beneath the adjoining shingle it forms the nailing edge, so called. 'lhus 3 according to its position it serves in either one or the other of these two capacities. hen E two shingles thus formed are connected together as shown in Fig. 1, it will be noted that the interlocking cap-j oint is thoroughlyshielded from rain driving in either direction; there 1 the interior beyond the bead at; and there is 1 provided Within the cap member a permanent j Y 1 open y alley g be 0nd and beneath the oint to j catch and at once carry off anv water which may percolate therethrough.

noted that by making both edges of the shins gles symmetrical as shown, it is possible with 1 such shingles to work from the left or from I the right of any one shingle with equal facilj ity, thus permitting two workmen to work 1 simultaneouslyfrom the same point, but in opposite directions.

Having set forth my improvement and the best way now, known to me of carrying the same into practical effect I state in conclusion that I do not limit myself strictly to the structural details herein shown and described in I the same can be varied in a number of partic- 1 ulars without departure from the spirit of my invention; but v What I claim herein as new and desire to secure by Letters Patent is as follows:

A roofing plate or shingle having symmetrically formed opposite edges, each formed or nailing edge as the case may be, a cap member i, j, of substantially inverted V form in cross section and a head as between the border and the cap member, as and for the purposes hereinbefore set forth.

! In testimony whereof I affix my signature in presence of two witnesses.

JOHN FRANCIS GALBRAITH. \Yitnesses STANLEY THOMPSON, J. H. BELL.

is practically no possibility of leakage into It will also be.

1 illustration of my invention, since manifestly. 

